Improvement in fire-bars



if@ h h v @fm N,PEYERS, FNOTO-LITHOGRAPHER, WASHINGTON, D C.

1 tiniied 51am @anni mijn.

WILLIAM BATCH-FLOR, 0F WIN CHESTER, ENGLAND, ASSIGNQR TO EDWIN RUSS ANDvTHOMAS'SHEWELL MORRIS, OF SAME PLACF.

i Letters ,Patent No. 111,031, dated January 17, 1871.

IMPROVEMENT lN FIRE-BARS.

The Schedule referred to in these Letters Pei-tent and making part oithe same.

, To all to whom it may concern:

in such a way that the upper part, which is more directly exposedl tothe heat, may be replaced when burnt away or unt for use, while theother or lower part maylast and be `available for a very much longertime.

The upper and lower parts are dovetaled or otherwise suitably' joinedtogether by projections on one itting. into corresponding cavities onthe other in such' a way that the fit is quite loose and easy when thebar is cold, but suiiiciently tight, when the bar is hot, topreventwarping or other inconveniences, the upper part expanding to a greaterextent than the lower.

The under part, where itis joined to the upper part, may be'scallopcd,cut out, notched, or perlbrated, for the air to pass right through. Thelower part may be hollow, or in two parts or sides, with a spacebetween.

In the accompanying drawing- Figure l is a side elevation, and

Figure 2, a vertical cross-section of my simplest form of fire-bar, cbeing the upper part and b the lower part, which here is made in onepiece; the two are joined together by projections on one litting into acorrespondingdovetail cavity on the other, as shown.

Figure 3 is an elevation oi' the upper part of a firebar, of a somewhatdifferent construction.

Figure 4 is an elevation, and

Figure 5, a plan of the ,corresponding lower part, which is east hollow,as shown.

rlhe three lugs c c c tit loosely'in between the two sides of b, and theupper ai1cl1o\vexypa1'ts are joined by split keys l l d, passing.through the holes ce ,e and the lugs c c c.

lhe air, entering into the cavity between the two sides of thelowerpart, passes ont through the small holes formed between the upper partand the notches in the lower part, and, by interiningling with theburning .elements of the fuel, causes perfect combustion, withoutleaving any clinliers, thereby causing a great saving in fuel.

The bar when joined and ready for service is shown in outside elevationby Figure 6, 'and in cross-section by Figure 7.

rlhe remaining figures, 8 to 13, show a'nethcrniodilieation in variousviews;

Figure 8 being an elevation of the upper part, and

Figures 9 and l0, elevations of each side, composing the lower part. Y

Figure il1 is a plan of one ofthe sides.

From figs. 9, l0, and 11 it will be seen that the two sides b and bnrejoined by corresponding dovetail pieces rlhe hook-shaped projections gr/ g catch hold ot' corresponding lugs on one oi the sides, and thus the`upper and lower parts are joined, as shown in Figure 12.

The notched upper edges oi the bearing-bars b serve as a support'to thefire-bars a, and allow a free circulation of air, to'prevent thebearing-bar becoming too hot.

The elongated holes for the keyed allow for any motion that maywariscfrom expansion or contraction.

I elailn as niy invention- I. The bearing-hars 1),. with notched upperedges, upon which the under side ol the fire-bars c rest, as and for the.purposes set forth.

2. The elongated openings c and keys d, combined with the bars a,bearers l), and projections upon the said bars c, as and for thepurposes set forth.

` WILLIAM BATCIHIELOR.

Witnesses: l t W ILLIAM H. Wooninnvon, F. BROWN.

